Observational Cohort Study- The Clinical and Laboratory Characteristics of Recurrent Drug- Related

The aim of this study is to identify factors associated with hyponatremia among patients hospitalized in the internal medicine ward. Consequtive patients hospitalized because of hyponatremia will be recruited. Follow up will include clinical factors such as background diseases, complete drug history, blood tests including Biochemistry tests (Sodium, renal function), endocrinological evaluation, thyroid function tests, cortisol,urinary sodium on addmition. One month following discharge follow up Sodium level will be taken.